Shielding Requirements for the Army Package Power Reactor

ESTIMATE OF THE RATIO OF Ta$sup 182$ TO Co$sup 60$ ACTIVITY EXPECTED IN THE APPR-1 CORE

“…Since there is not any information about the fast absorption cross section of Co and Ta , the terms involving Q~ , and Cr\ will 60 be ignored in Eqs. (2) and (3). The decay rate of Co is given by A IT (t) and the decay rate of Ta is given by A.…”